Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00001445
11/12/99

Thuja plicata--Giant Arborvitae


Hardiness Zones: 5 to 7
Height: 60 ft Spread: 20 ft Form: pyramidal
Type: narrow-leaved evergreen tree
Annual Growth Rate: less than 12 inches

Comments: Giant Arborvitae is native to the Pacific
Northwest and has bright green, almost fern-like foliage.
The plant adapts to both wet and dry soil.

Cultivars:
'Atrovirens' - A pyramidal plant with dark green
foliage, somewhat slower growing (Vis. 1).
'Cuprea' - A dwarf, globe form with deep green needles
tipped with yellow, globe form.
'Excelsa' - A fast growing plant developing a pyramidal
form (Vis. 2). The bright green foliage turns bronze
in winter on these 15- to 20-foot tall plants.
'Green Giant' - A hybrid of T. plicata and T.
standishii. The plant has rich green foliage and is
broadly pyramidal.
'Grovpli' (Spring Grove TM) - A 20-foot tall plant with
good winter color and hardiness.
'Hogon' - A conical form reaching a height of about 20
feet.
'Sunshine' - Golden foliage.
'Stoneham Gold' - An shrub with an upright habit. New
growth dark gold becoming green.
'Virescens' - A narrow form with dark green foliage all
year. The plant will be more than 30 feet tall.
'Zebrina' - A broadly pyramidal plant with yellow
foliage variegations. Will grow to 30 feet.

References for Cultivars: Spring Meadow Nursery 1999,
Princeton Nurseries 1999, Iseli Nursery, 1999, Spring
Meadow Nursery 1997, Weston Nurseries 1999, Wayside Gardens
1999, Gee Farms 1999, Willoway Nurseries 1999.


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